My iPhone/iPad 3G doesn't recognize my SIM card.

Devices using AT&T's networks use SIM cards to store information and access the network. If your iPhone or iPad Wi-Fi + 3G has trouble recognizing your SIM card, you can try the following:

iOS devices running on AT&T's network have SIM card trays in different places.

Use a paper clip or a pin to push into the SIM card ejection hole. This ejects the tray holding your SIM card.

Check it to make sure the card and tray are free of dirt or dust. (You can blow into the empty slot to clean out any dust.)

Put the SIM card back in the tray, and slide the tray back into the slot.

If this doesn't solve the problem, there's not much you can do besides calling support from Apple, AT&T, or Verizon.

Clear the clipboard of sensitive info

You can use the clipboard feature to copy and paste information from one app or document to another. However, remember that once something is copied to the clipboard, it remains there until you copy or cut something else. It's possible to accidentally paste whatever is in the clipboard (e.g., credit card or bank account numbers) into another document or message.

Unfortunately, there is not built-in feature to clear the clipboard. You'll have to copy or cut something else into the clipboard to delete its current contents. (Based on an e-mail from Carol Coston)